Even though I enjoyed it, the prequel trilogy was hated by loyal Star Wars fans for a variety of different reasons. From the overuse of CGI to Hayden Christensen's stiff acting style, nothing in the trilogy was more hated than the clumsy Gungan tag-along character Jar Jar Binks.
From his shrill obnoxious voice to the childish way he spoke, the character was simply loathed by almost every Star Wars fan in existence. What if he was created that way for a purpose? What if we were supposed to hate him, because of what he would go on to do later on in the trilogy.
Even though the majority of Jar Jar's screen time was in The Phantom Menace, the character went on in Attack of the Clones and Revenge of the Sith. Instead of being a bumbling, clumsy fool like he was in the first movie, Jar Jar went on to represent his home-planet of Naboo in the Senate. He couldn't do much damage there right?
It was there in the Senate where Jar Jar did the most damage in the entire series. You remember that scene in Revenge of the Sith where we went from thinking of Anakin as a whiny teenager to a psychopathic killer?
Well a series of events took place in order for that one particular event to occur. The most important event was Palpatine becoming Supreme Chancellor. It was at this post that Palpatine was able to influence entire civilizations to rally to his cause and support him as he took control of the galaxy.
He didn't take control easily though. While he did have some power as Supreme Chancellor, he didn't have the ability to "execute Order 66" until he was granted emergency power from the Senate. In order to gain emergency power, somebody would have to make the notion to do so, and someone sure did.
When Jar Jar made the notion to appoint emergency powers to Palpatine, he wasn't just giving him the ability to bring in the Clone army, he gave Palpatine the ability to do what he wanted with that army. That includes Order 66.
Without Jar Jar, Palpatine would never have had the power to massacre the Jedi. Without Jar Jar, the Jedi would have won the Clone Wars. Without Jar Jar, the Sith couldn't have risen to power so easily.